According to OMA website it is 1:10. From a gain perspective probably OK with Kleos 0.5mV, although would be curious about the Aric 6sn7 gain. Might the Kleos sound better in this system with lower ( numerically ) load? Maybe. Could require some experimentation.
Can't comment on synergy with Project arm, 8.5g eff mass on the light side. I do think Lyra carts are sensitive to both arm synergy and setup and when both / either is wrong you get that ' analytical ' sound.